228258 has 20 divisors (see below), whose sum is σ = 511830. Its totient is φ = 76032.

The previous prime is 228257. The next prime is 228281. The reversal of 228258 is 852822.

It can be written as a sum of positive squares in only one way, i.e., 227529 + 729 = 477^2 + 27^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 543 + ... + 866.

2²²⁸²⁵⁸ is an apocalyptic number.

228258 is an abundant number, since it is smaller than the sum of its proper divisors (283572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228258 is a wasteful number, since it uses less digits than its factorization.

228258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1414 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 228258 is about 477.7635398395. The cubic root of 228258 is about 61.1141819087.

The spelling of 228258 in words is "two hundred twenty-eight thousand, two hundred fifty-eight".